Omron HEM-780 Instruction Manual page 46

ERROR INDICATORS AND TROUBLESHOOTING TIPS
TROUBLESHOOTING TIPS
PROBLEM
No power.
No display appears on
the unit.
Measurement values appear
too high or too low.
CAUSES AND SOLUTIONS
Replace all four batteries with new
ones. Check the battery installation
for proper placement
of the battery polarities.
Blood pressure varies constantly.
Many factors including stress, time
of day, and how you wrap the cuff,
may affect your blood pressure.
Review the sections "Before
Taking a Measurement" and
"Taking a Measurement."
46